ICD-9-CM diagnosis code (retired)
996.66 — Infection and inflammatory reaction due to internal joint prosthesis
ICD-9-CM was replaced by ICD-10 on October 1, 2015. These are the ICD-10-CM equivalents from the CMS General Equivalence Mappings.
About ICD-9-CM 996.66
996.66 is an ICD-9-CM diagnosis code for infection and inflammatory reaction due to internal joint prosthesis. ICD-9-CM was retired for U.S. claims on October 1, 2015, when ICD-10-CM took over.
The CMS General Equivalence Mappings translate it to one ICD-10-CM code, T84.50XA (Infection and inflammatory reaction due to unspecified internal joint prosthesis, initial encounter). The match is approximate, so confirm it against the record.
ICD-10-CM equivalents
- T84.50XAInfection and inflammatory reaction due to unspecified internal joint prosthesis, initial encounterapproximate
Common questions about 996.66
What is the ICD-10 code for ICD-9 996.66?
- The GEMs map 996.66 to ICD-10-CM T84.50XA.
GEMs are a translation aid, not a substitute for coding from the record. The 2027 ICD-10 code set has changed since the last GEMs release in 2018. Page updated September 29, 2026.